Using the charging technology for electric vehicles safely

AC charging

Safe charging of electrical vehicles

AC charging column

Level 3 EVSE can be found at home, in hotels, or at the workplace. The required infrastructure for those charge ports is relatively simple and usually required only a 120v or 240v connection. Bender's RCMB ground fault sensing devices monitor circuits effectively for fault currents that can pose hazards to personnel and equipment. The devices are listed to UL2231 and fulfill all the stringent safety requirements.

Market segment brochure eMobility
Technical paper Charging Electric Vehicles - Protection against Electric Shock by DC Fault Current Sensor Units
Technical paper Charging Electric Vehicles - Protection against Electric Shock by DC Fault Current Sensor Units

Recommended systems for ground-fault monitoring (grounded systems):

Recommended Smart-Grid Charge Controller:

DIN IEC/TS 61439-7
Low-voltage switchgear and controlgear assemblies - Part 7: Assemblies for specific applications such as marinas, camping sites, market squares, electric vehicles charging stations

Charging cable (IC-CPD)

Safe plug-in solution

Charging cable (IC-CPD)

As level 1 AC charging involves charging the electric vehicle from the normal outlet at home, the charging infrastructure is simply the charging cable. This special charging cable must have an integrated monitoring system capable of triggering a 6 mA ground fault. Bender offers ground-fault monitoring sensors for level 1 charging cable manufacturers. These sensors can be used in EVSE cords in accordance with UL 2231.

Market segment brochure eMobility
Technical paper Charging Electric Vehicles - Protection against Electric Shock by DC Fault Current Sensor Units

Recommended systems for ground-fault monitoring (grounded systems):

IEC 62752
In-Cable Control and Protection Device for mode 2 charging of electric road vehicles (IC-CPD)


DIN EN 62752

In-Cable Control and Protection Device for mode 2 charging of electric road vehicles (IC-CPD)

DC fast charging

Electrical safety while charging electric vehicles

DC charging column

Larger charging stations and quick charging stations use DC current. Generally, the power configuration for a DC Fast Charger is ungrounded or "floating". DC charging involves passing an external DC voltage directly to batteries connected in series. In order for current to flow, the voltage must be governed so that it is always slightly higher than the current cell voltage of the batteries connected in series. This involves complex charging control systems as the currents can go up to several 100 A. This process recharges the battery in around 15 minutes. This is ideal for recharging during a journey or at a service station. In order to prevent the ground-fault device in the vehicle and the one in the charging column influencing one another, the ground-fault monitoring device in the vehicle is also deactivated during the charging process. The ground-fault monitoring device in the charging station then monitors the entire charging current circuit. The Bender products are market leaders and offer a very high level of safety.

Market segment brochure eMobility

Recommended systems for ground-fault detection (ungrounded systems):

DIN IEC/TS 61439-7
Low-voltage switchgear and controlgear assemblies - Part 7: Assemblies for specific applications such as marinas, camping sites, market squares, electric vehicles charging stations